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Energies 2013, 6(4), 1993-2006; doi:10.3390/en6041993

Optimal Constant DC Link Voltage Operation of a Wave Energy Converter

Division of Electricity, Swedish Centre for Renewable Electric Energy Conversion, P.O. Box 534, 751 21 Uppsala, Sweden
Author to whom correspondence should be addressed.
Received: 6 February 2013 / Revised: 21 March 2013 / Accepted: 22 March 2013 / Published: 8 April 2013
(This article belongs to the Special Issue Energy from the Ocean - Wave and Tidal Energy)
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This article proposes a simple and reliable damping strategy for wave powerfarm operation of small-scale point-absorber converters. The strategy is based on passiverectification onto a constant DC-link, making it very suitable for grid integration of the farm.A complete model of the system has been developed in Matlab Simulink, and uses real sitedata as input. The optimal constant DC-voltage is evaluated as a function of the significantwave height and energy period of the waves. The total energy output of the WEC is derivedfor one year of experimental site data. The energy output is compared for two cases, onewhere the optimal DC-voltage is determined and held constant at half-hour basis throughoutthe year, and one where a selected value of the DC-voltage is kept constant throughout theyear regardless of sea state.
Keywords: wave energy; DC link voltage control; point absorber; linear generator wave energy; DC link voltage control; point absorber; linear generator

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Kurupath, V.; Ekström, R.; Leijon, M. Optimal Constant DC Link Voltage Operation of a Wave Energy Converter. Energies 2013, 6, 1993-2006.

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